package com.zaizai.reggie.filter;


import com.zaizai.reggie.common.BaseContext;
import com.zaizai.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import com.alibaba.fastjson.JSON;

@Slf4j
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest)servletRequest;
        HttpServletResponse response=(HttpServletResponse)servletResponse;
        //1.获取本次请求的URI
        String URI = request.getRequestURI();
        //2.判断本次请求是否需要处理
        log.info("本次请求URI："+URI);


        //放行的请求
        String[] urls=new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"

        };
        boolean cheak = cheak(urls, URI);


        //3.如果不需要处理，则直接放行
        if(cheak){
            log.info("放行请求URI："+URI);
            filterChain.doFilter(request,response);
            return;
        }

        //4-1判断登录状态，如果已登录，则直接放行
        if(request.getSession().getAttribute("employee")!=null){
            Long empid = (Long)request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empid);
            filterChain.doFilter(request,response);
            return;

        }
        //4-2判断登录状态，如果已登录，则直接放行
        if(request.getSession().getAttribute("user")!=null){
            Long userid = (Long)request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userid);
            filterChain.doFilter(request,response);
            return;

        }
        //5.如果未登录则直接返回未登录结果
        log.info("未登录请求URI："+URI);
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
    }


    public boolean cheak(String[] urls,String requestUri ){
        for (String url:urls) {
            boolean match=PATH_MATCHER.match(url,requestUri);
            if(match)
                return true;
        }
        return false;
    }
}
